[Shi Haochen] iP

src/main/java/Deadline.java

@@ -0,0 +1,13 @@
+public class Deadline extends Task{
+    protected String by;
+
+    public Deadline(String description, String by) throws DukeException{
+        super(description);
+        this.by = by;
+    }
+
+    @Override
+    public String toString() {
+        return "[D]" + super.toString() + " (by: " + by + ")";
+    }
+}

src/main/java/Duke.java

@@ -1,10 +1,92 @@
+import java.util.Scanner;
+import java.util.List;
+import java.util.ArrayList;
 public class Duke {
+    protected final static String line = "_______________________________________________";
+    private static void print(String message){
+        System.out.println(line);
+        System.out.println(message);
+        System.out.println(line);
+    }
     public static void main(String[] args) {
-        String logo = " ____        _        \n"
-                + "|  _ \\ _   _| | _____ \n"
-                + "| | | | | | | |/ / _ \\\n"
-                + "| |_| | |_| |   <  __/\n"
-                + "|____/ \\__,_|_|\\_\\___|\n";
-        System.out.println("Hello from\n" + logo);
+        String greet = "Hello! I'm Elwin\n" + "What can I do for you?";
+        //String line = "_______________________________________________";
+        String exit = "Bye. Hope to see you again soon!";
+        String listRequirements = "Here are the tasks in your list:";
+        String markRequirements = "Nice! I've marked this task as done:";
+        String unmarkRequirements = "OK, I've marked this task as not done yet:";
+        String markFormat = "^mark \\d+$";
+        String unmarkFormat = "^unmark \\d+$";
+        System.out.println(line);
+        System.out.println(greet);
+        System.out.println(line);
+        Scanner scanner = new Scanner(System.in);
+        List<Task> todoList = new ArrayList<>();
+        while(true){
+            String input = scanner.nextLine();
+            if(input.equals("bye")){
+                break;
+            }else if(input.equals("list")){
+                System.out.println(line);
+                System.out.println(listRequirements);
+                for(int i = 0; i < todoList.size(); i++){
+                    System.out.println(i+1 + "." + todoList.get(i));
+                }
+                System.out.println(line);
+            }else if(input.matches(markFormat)) {
+                int index = Integer.parseInt(input.substring(5));
+                try{
+                    todoList.get(index-1).unmarkAsDone();
+                }catch(IndexOutOfBoundsException e){
+                    print("☹ OOPS!!! The task number is not in the list.");
+                    continue;
+                }
+                print(markRequirements+"\n  "+todoList.get(index-1));
+            }else if(input.matches(unmarkFormat)) {
+                int index = Integer.parseInt(input.substring(7));
+                try{
+                    todoList.get(index-1).unmarkAsDone();
+                }catch(IndexOutOfBoundsException e){
+                    print("☹ OOPS!!! The task number is not in the list.");
+                    continue;
+                }
+                print(unmarkRequirements+"\n  "+todoList.get(index-1));
+            }else if(input.split(" ")[0].equals("todo")){
+                Todo todo;
+                try{
+                    todo = new Todo(input.substring(4, input.length()));
+                }catch(DukeException e){
+                    continue;
+                }
+                todoList.add(todo);
+                print("Got it. I've added this task:\n  "+todo+"\nNow you have " + todoList.size() + " tasks in the list.");
+            }else if(input.split(" ")[0].equals("deadline")){
+                Deadline deadline;
+                try {
+                    deadline = new Deadline(input.split("/")[0].substring(9, input.split("/")[0].length() - 1), input.split("/")[1].replace("by ", ""));
+                }catch (DukeException e){
+                    continue;
+                }
+                todoList.add(deadline);
+                print("Got it. I've added this task:\n  "+deadline+"\nNow you have " + todoList.size() + " tasks in the list.");
+            }else if(input.split(" ")[0].equals("event")){
+                Event event;
+                try{
+                    event = new Event(input.split("/")[0].substring(5, input.split("/")[0].length()-1), input.split("/")[1], input.split("/")[2]);
+                }catch(DukeException e){
+                    continue;
+                }catch(StringIndexOutOfBoundsException e){
+                    print("☹ OOPS!!! The description of a event should use \\ mark start time and end time.");
+                    continue;
+                }
+                todoList.add(event);
+                print("Got it. I've added this task:\n  "+event+"\nNow you have " + todoList.size() + " tasks in the list.");
+            }else{
+                print("☹ OOPS!!! I'm sorry, but I don't know what that means :-(");
+            }
+        }
+        scanner.close();
+        System.out.println(exit);
+        System.out.println(line);
     }
 }

src/main/java/DukeException.java

@@ -0,0 +1,9 @@
+public class DukeException extends Exception{
+    protected String line = "_______________________________________________";
+    public DukeException(String message){
+        super(message);
+        System.out.println(line);
+        System.out.println(message);
+        System.out.println(line);
+    }
+}

src/main/java/Event.java

@@ -0,0 +1,19 @@
+public class Event extends Task{
+    protected String by;
+    protected String from;
+    public Event(String description, String from, String by) throws DukeException{
+        super(description);
+        if(!from.contains("from ")){
+            throw new DukeException("☹ OOPS!!! The description of a event must contain \"from\" time.");
+        }else if(!by.contains("to ")){
+            throw new DukeException("☹ OOPS!!! The description of a event must contain \"to\" time.");
+        }
+        this.from = from;
+        this.by = by;
+    }
+
+    @Override
+    public String toString() {
+        return "[E]" + super.toString() + " (from: " + this.from + " to: " + this.by + ")";
+    }
+}

src/main/java/Task.java

@@ -0,0 +1,29 @@
+public class Task{
+    protected String description;
+    protected boolean isDone;
+
+    public Task(String description) throws DukeException {
+        if(description.isBlank()){
+            throw new DukeException("☹ OOPS!!! The description of a task cannot be empty.");
+        }
+        this.description = description;
+        this.isDone = false;
+    }
+
+    public String getStatusIcon() {
+        return (isDone ? "X" : " "); // mark done task with X
+    }
+
+    public void markAsDone() {
+        this.isDone = true;
+    }
+
+    public void unmarkAsDone(){
+        this.isDone = false;
+    }
+
+    @Override
+    public String toString() {
+        return "[" + getStatusIcon() + "]" + this.description;
+    }
+}

src/main/java/Todo.java

@@ -0,0 +1,10 @@
+public class Todo extends Task{
+    public Todo(String description) throws DukeException{
+        super(description);
+    }
+
+    @Override
+    public String toString() {
+        return "[T]" + super.toString();
+    }
+}